[PATCH net-next] liquidio: 'imply' ptp instead of 'select'

ptp now depends on the optional POSIX_TIMERS setting and fails to build
if we select it without that:

warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
ERROR: "posix_clock_unregister" [drivers/ptp/ptp.ko] undefined!
ERROR: "posix_clock_register" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_unregister_source" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_event" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_register_source" [drivers/ptp/ptp.ko] undefined!

It seems that two patches have collided here, the build failure
is a result of the combination. Changing the new option to 'imply'
as well fixes it.

Fixes: 111fc64a237f ("liquidio CN23XX: VF registration")
Fixes: d1cbfd771ce8 ("ptp_clock: Allow for it to be optional")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ethernet/cavium/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig
index bbc8bd16cb97..dcbce6cac63e 100644
--- a/drivers/net/ethernet/cavium/Kconfig
+++ b/drivers/net/ethernet/cavium/Kconfig

@@ -77,7 +77,7 @@ config OCTEON_MGMT_ETHERNET
 config LIQUIDIO_VF
 	tristate "Cavium LiquidIO VF support"
 	depends on 64BIT && PCI_MSI
-	select PTP_1588_CLOCK
+	imply PTP_1588_CLOCK
 	---help---
 	  This driver supports Cavium LiquidIO Intelligent Server Adapter
 	  based on CN23XX chips.

-- 
2.9.0